Adjustable lamp-support.



. PATENTED MAR. 20,1906; H; STEVENSON. ADJUSTABLE LAMP SUPPORT.

APPLIUATION FILED MAY 4, 1905.

k W! T NESSES INVENTOR.

ATTORNEY S.

5 slightly to frictionally engage said'tube 3 and ren w To wlZ'lwhom it may concern 1 a Beli-t known that I, J oHNH. STEVENSON, a citineri'of the United I; aingiat Ann Arbor, inthe county of Washtenaw and State of Michigan, have invented .eertain new and useful-Improvements in Ad- States of'America, residjustable Lamp-Supports, of which the followmg is a specificatmn, reference being bad therein to the accompanying drawings. ['0

-r-for su lamp to lmproved means porting and holding an incandescente ulb and its object is to providea very This invention relates '1 simple and cheap construction for the purpose which is so arranged that it may be adjusted within certainhmits to'hold the bulb fi=. ini:"any desired position and which has the I perspective view 0 several advantages of the particular construction, arrangement, and combination of parts,

all as hereinafter more fully described, refersince being hadto the accompanying drawings,

in which- Figure 1 is a side elevation of a device em-' bodyi'ng the invention; Fig. 2, a central lonitudinal section through ig. 3, an elevation 0 without the clam ing' sleeve. Fig. 4 is a the clampin slide. Fig. 5 is a front elevation of the wallracket, and Fi 6 isa detail illustrating the use of the holding-finger.

As, shown in the drawings," 1 is the mean descent lamp or bulb, and 2 the socket therefor, both being of the ordinaryand Wellknown construction. The socket 2 isadapted to be secured in any suitable manner to the end of a tube 3, through which the ordinary flexible conductors 4extend from-the socket out. through the open end thereof, and

. a similar tube or rod 5 extends in parallelism with said tube. 3 and is provided with a clamp or slide 6 to. embrace and clamp said tube 3.

The clamp 6 consists'of two connected tubular members, the end of the tube 5being brazed or otherwise secured in the member 7 and the tube 3 being ada ted to slide throu h the-member 8, which is s itted longitudinally inward from each end a short distance, then cut transversely at'the end of each slit, thus forming sprung members or fingers 9 at 'each endv of the member 8, which are bent inward d the same in any position to which it is end of. the rod 5 opposite that to which the clamp is secured is provided with a ball 10 by forming a'jreduced and screw-threaded end NITED STATES. P E T CE iqonn S EV NSON, or ns ARBOR, incHreAN;

' ADJUSTABLE L MP- suPPoRT.

"bracket formedv with adapted to receive the ball,

diameter than the diameter of the ball.

the universal joint the ball and socket Patented .March 20-, 1 906.

threaded socket in the ball, and 12 is a diverging arms proyided with 0 enings 13 for screws for fasten-'" irig, the bracl et to the side wall or' ceiling or other suitable support and with a central hollow boss 14, forming a socket within which the shank portion 15 of a split socket 16, v 1s"-permanently secured. I The socket 16 is sawedor slit vertically and also-horizontally inward from its open end through its longitudinal axis to form four yielding members 17, whichwill sprin sufficiently to permit the ball to beinserte through the open end of the socket, which opening is normally of a slightly cllessj he members 17 are forced into contact with the ball to frictionally clamp the sameand hold the rod 5 at any angle to'the bracket, to which it may be 'adiusted by a clampingsleeve 18, which is internally screw-threaded to engage an external screw-thread on them stem of the'socket member and provided with a flaring end portion 19 .to contact the 'outer surface of the yielding members 17 and force the same into contact with the ball when turned or screwed longitudinally on the stem toward said members. Said flaring end portionis so formed that it will contact the .yieldmg member s-only near its outer end and near the ends of said members op osite the ball, and therefore the members will gri the ball with a great deal of-force when the s eeve is turned up hard by means of a spannerwrench engaging the opening 20 in the sleeve or by any other means. a

A spring-hook or finger 21 is secured in any suitable manner to the tube 3 adjacent to the end thereof to. which the lamp socket is adapted to be secured, so that when said tube is held in a horizontal position and it is desired that the lamp be supported in a vertical 7 osition from the end thereof the socket may he detached from the tube andthe 1-1 on the rod, which .is screwed into a screw- I00 I conduc-. tors 4 brought out of its end and passed beneath the s ring finger or hook 21, which will yielding y clamp and hold the wires, thus holding the lamp suspended from the end of the tube at the desired height.

.It'is evident that the bracket may be. see

cured to the ceiling, side wall, or an other suitable place of support and that t e universal or ball-and-socket connectlon of the supporting-rod therewith will permit said rod to be. moved at any angle thereto. The l tube 3 forms an extension for the rod 5 and may be readily moved to lengthen or shorten the support as the operator may desire.

llaving thus fully described my invention, what i claim is- 1. The combination with a bracket adapted to be secured to a wall or other support, of a rod attached at one end to said bracket, a tube extending parallel with said rod, and a clamp consisting of a tubular member secured to the rod and slitted longitudinally inward from each end and cut transversely at the end of each slit to form spring-fingers to engage the tube.

2. The combination with a bracket adapted to be secured to any suitable support, of a supporting-rod, a ball on one end of said rod, a socket on the bracket slitted inward from its open end to form flexible members and externally screw-threaded, a clamping-sleeve formed with a flaring end to engage the flexihlc members and internally screw-threaded to engage the screw-thread on. the socket member, a clamp secured to the opposite end of said rod and atube adjustable longitudinaliy in said clamp.

3. The combination with a bracket ad apted to be secured to any support, of a supporting-rod having a reduced and screw-threaded end, a ball having a screw-threaded socket to receive said end on the rod, a socket member consisting of a screw-threaded shank portion secured to the bracket and a socket portion. to receive the ball slitted longitudinally in.- ward from the open end of the socket to form flexible clampin members, an internallyscrew-threaded c amping-sleeve engaging the screw-threaded portion of the shank and formed with a flaring end adapted to embrace and engage the flexible members near their outer ends, a clamp secured to the end of the rod and consistin of a tubular member formed with springgers, a tube movable longitudinally in-said tubular member and engaged by the fingers, a lamp-socket secured to one end. of said tube, and conductors extending through said tube to the lampsocket.

In testimony whereof I afiix my signature in presence of two witnesses.

JOHN H. STEVENSON. VVitnesses':

GEO. H. RINsEY, 1*. LA RUE RAYMOND. 

